Hello, all this is my first post. I own a 2010 Altima 3.5sr and have put around 20k on it now at 115k miles. It is black with a red interior I love the car a lot except for the fact it has the CVT. I notice upon a cold start during my initial acceleration at around 10mph I hear a metal grind noise then it disappears until next cold start initial acceleration. Any ideas? Luckily I bought an extended bumper to bumper warranty that lasts till about 160k miles so do not spare my feelings lol.